Pulp-filter.



T. L. CRANE.

' PULP FILTER. APPLlCATlON FILED APR- 5,1917.

Pdtented J une 11, 1918.

2 SHEETSSHEET 1 1 L. CRANE.

PULP FILTER. APPLICATION FIYLED APR. 5. m1.

1,268,935. PafentedJunell, 1918.

2 SHEETS-SHEET 2.

citizen of the United States, residin roams L. ensue, or

air h h i't'filtl TYBONE, NEW MEXICO.

roar-mane.

Application filed hpril 5, 1917. Serial No. 160,043.

To all whom it com/era:

Be it known that I, TOBIAS L. CRANE, a at Tyrone, in the county of Grant and tate of New Mexico, have invented certain new and useful- Improvements in Pulp-Filters;

and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

' c This invention relates to improvements in a pulp filter of the type employing a tank or casing having a foraminous rum of the suction type and airlifts and neumatic agitators and has for one of its 0 jects the provision of an agitator, which obviates the use of 'airlifts and pneumatic agitators, which have proven to be impractical, owing to their becomin clogged or stopped up, causing the unre nod the drum and render the device inoperative.

Another object of this invention is to provide the agitator so located in the casing or tank with respect to the drum that the pulp will be kept thoroughly agitated and prevented from backing against the drum hinderin the operation of the same.

A furt er ob ect of this invention is to provide the agitator of arcuate formation so that the same will conform to the contour ofthe drum and which will prevent the backing of pulp against the drum.

A further object of this invention is the provision of a pulp filter attachment of the-above stated character, which shall be simple, durable and cfiicient, and which may be manufactured and sold at a comparatively low cost,

With these and other objects in view, as will become more apparent as the description proceeds, the invention consists of certain novel features of construction, combi nation and arrangement of parts as will be hereinafter more fully described and claimed. a

For a complete understanding of my invention, reference is to be had to the followns description and accompanying drawin in which:

.i-igure l is an end elevation of a pulp filter constructedin accordance with my'invention,

Fig. 2 is same,

Fig. 3 is a transverse sectional view of a vertical sectional view of the pulp to back against the device illustrating the location or the agitator, and r at is a planiview of the a 'itator.

In pulp filters of the type emp oying the casing having the foraminous suction drum and, pneumatic agitators and lifts, it has been found that the pulp in the unrefined state which is within the casing or tank works its way through the stuffing boxes, cutting out the packing which necessitates the discontinuance of operation for a period v or considerable length in order to repack the stuffing boxes and also the pulp becomes he'avy or contains coarse material, causing thepulp' to work its way into the pneumatic agitator and air lifts causing them to become clogged and render the device inoperative. When the agitator becomes inoperative, the pulp backs against the foraminous drum and grips the same,

thus causing a great increase in the power .to drive the filter. If at this-point, attention is not given-to the a cgumulation of i pulp within the casing or tank, the strain on the machine becomesso great as to break the bearings of the driving construction of the device. To overcome the above objections to pulp filters of well known construction now upon the market, I have provided a novel type of machine, which readily overcomes the aforementioned objections, and which. will be hereinafter clearly described.

A substantially semircircular tank 1 has bearing 2, formed thereon, in which is iournaled, a shaft 3 carrying a foraminous drum' 4: of the suction type. The suction may be created within the foraminous drum 4 in any well known manner. The shaft 3 is driven by. any suitable motor power connected to the pulley 5 for the purpose of rotating the lforaminous drum 4:.

The pulp in an unrefined state may be administered to the-tank in any well known manner and upon rotation of the foraminous drum 4, the pulp will adhere to the periphcry thereof owing to the suction created therein. A scraper 6 is carried by the casing; or tank 1 and i adapted to remove the pn p which has adhered to the periphery of the drum 4 as the same slowly rotates and deposits the same upon a suitable apron or conveyer, (not shown) by way of a chute I, A pair of arcuate shaped and relatively spaced members 8 are connected together by members 9, which are constructed from angle iron a clearly shown-in Fig. 3, Upwardly and inwardly convergingarms are formed upon the arcuate shaped members 8 and to journals 11, which are rotatably mounted upon the bearings 2. Upwardly extending arms 12 are formed upon the journals 11 and have their upper freeends-connected together by a bar 13, Rods- Mare journaled upon the rod 13 and are pivotally connected to crank arms 15 carried by the ends of a drive shaft 16. The drive shaft 1 16 is rotatably supported by standards 17 l and has secured thereon, a pulley 18, which may be connected. to any suitable motor power for the purpose of rotating the drive shaft 16, which causes the crank arms 15 to oscillate the arcuate shaped members within the tank or casing 1. The arcuate shaped members being connected by the members 9 provides a very efiicient agitator, which will freely oscillate within the tank or casing 1 i at a point below the lowest periphery of the foraminous drum, thus preventing'the 11nrefined pulp within the tank or casing from banking against the drum and rendering the same inoperative. The members 9 being constructed from angle iron provide'agitab ing strips for the agitator, which will thoroughly mix and agltate the unrefined pulp. From the foregoing description taken in connection withthe accompanying drawings, it will be noted that a novel form of agitator has'been provided, which will obmate the use of the ordinary air lifts, pneumatic'agitators and other types of mechanical agitators, and'which will efliciently operate under all conditions, preventing the accumulation or banking up of unrefined within the casing or ank.

pul

v hile .I'have shown arid described the preferred embodiment of my invention, it will be understood that minor-changes in construction, combination and arrangement of parts may be {made without departing from the spirit and scopdof the invention as claimed;

Having thus described my invention, what I claim is:

A pulp filter comprising a casing, a suction drum, bearings formed on said casing and rotatably supporting said drum, a pair casing, upwardly and inward y extending arms formed on said members, journals formed on said arms and rotatably sup- 1ron members connecting the arcuate shaped members and havlng their apexes disposed adjacent the drum to remove pulp there-I from, and means oscillating @the' arcuate shaped members.

of arcuate shaped members dis osed in said v at ported by said bearings, a plurality of angle Intestimon whereof I afiin my signature 

